Discussions By Condition: I cannot get a diagnosis.

Need help.

Hello this is my first time posting a forum so here I go. For the past two days I woke up feeling nauseous and that hasn't went away. Plus I have been having diarrhea also. On top of that my legs have been tired and weak. I also my body has been sort of twitching. Every time I go to sleep I sleep fine but after that I can't seem to sleep at all. So hour after hour I can't seem to sleep and I wake up very tired. I need help to figure out what is causing this to happen to me. Oh and I'm a 16 year old boy.